CN102354325B - Searching method for single-terminal network - Google Patents

Abstract

The invention provides a searching method for a single-terminal network. In the method, a schematic network output by candence and a PCB (Printed Circuit Board) network are settled and compared in a manner of using a software plug-in unit so as to find out the difference between the two networks, thus the single-terminal network in the schematic network can be searched, wherein the plug-in unit is realized by a third party language, namely the perl language; aiming at three conditions of generating the single-terminal network, the three conditions have a common feature that the single-terminal network is not in the schematic network while the schematic network is exported, but in the network exported from a corresponding PCB, with the existence of specific pins, the single-terminal network can be in a PCB network list, so, the troubled single-terminal network can be searched out by comparing the two network lists, and in specific implementation, a scripting language perl is used for realization.

Description

A kind of lookup method of single-terminal network

Technical field

The present invention relates to a kind of electronic circuitry design technology, specifically a kind of lookup method of single-terminal network.

Background technology

At present, generally all adopt first design concept figure for the electronic circuitry design industry when designing, then import pcb board by schematic diagram and design.All easily occur more rudimentary but do not allow detectable mistake at stages, such as this invents problem---the single-terminal network that solves.

The below introduces for cadence three kinds of situations that single-terminal network occurs:

1) schematic diagram will be drawn grid line by the pin of device in the process of drawing, this pin is all represented by a line, and grid line is also to be represented by a line, the two is easy to occur there is no alignment in the process that connects and there is no situation in connection, and the device pin that need to be connected like this exists with regard to becoming single-terminal network;

2) schematic diagram in the process of drawing, often needs the schematic diagram of tens pages of what several louvers of picture.When a network need to be connected to network on other page numbers, we usually adopted the form of port to connect---and the network that needs on two page numbers to connect is all drawn port and is got identical name and just can connect.If the schematic diagram very complex, the duration when pretty nervous, is easy to occur only having drawn a port again, does not have corresponding another one, just single-terminal network occurred like this;

3) the indivedual pins of the schematic diagram device (being commonly referred to as the storehouse) of setting up are hidden.The pin that this situation can not occur hiding in schematic diagram, but can there be this pin and can has its corresponding network in the PCB device.Only there is network in this situation in pcb, but do not show this network in schematic diagram, also can regard as unilaterally has network to exist, this situation is the design needs sometimes, but tend to implicit design risk, be one-sided network like this, such network also can be invented to find out by this, guarantees correct.

And for the Network Check software that carries in candence, inconsistent with schematic diagram slip-stick artist's use habit, it is just complicated describing, confirm that fast problematic network needs the plenty of time, be that availability is relatively poor, therefore developed this software, locate fast single-terminal network.

Summary of the invention

The lookup method that the purpose of this invention is to provide a kind of single-terminal network.

the objective of the invention is to realize in the following manner, adopt the form of software package arrange and compare for schematic diagram network and the PCB network that candence exports, find out wherein different parts, can find out the single-terminal network that exists in schematic diagram, this plug-in unit is to use third party's language perl language to realize, for three kinds of situations that single-terminal network occurs, they have common characteristics is exactly can't be included therein when deriving the schematic diagram network, so but can be present in pcb net table because of the existence that concrete pin is arranged in the network that corresponding pcb derives in, just can find in-problem single-terminal network by contrasting these two kinds of net tables like this, what during concrete enforcement, we adopted is that script perl realizes, performing step is as follows:

At first, process the net table that PCB derives, this net table comprises many contents, and network title wherein, device name, the device pin title is that we are needed, and exactly have this part to exist in this net table, and only form is not that we are needed, at first we will locate our needed part according to the special sign character, then according to our needed form, wherein content is arranged, obtain in our needed content and form and storage and a file A;

Then, handling principle figure derives next net table, when deriving the net table, five options are arranged, we select concise netlist(dialcnet.dat), because the net table that this option is derived is close with our needed form, just need to remove the rearmost description of each network, we realize this conversion with the perl language, and are stored in another file B;

At last, use the comparison program edit, relatively A file and B file, find out different networks, then output in file c, and add up the number of different network, this file be final we need to offer schematic diagram slip-stick artist's file.

The invention has the beneficial effects as follows: the present invention is as a kind of third party software, the net table of schematic diagram derivation and the net table of pcb derivation are arranged and compare, find out wherein inconsistent network, and export according to slip-stick artist's use habit, convenient to use.The single-terminal network of searching in this way in the candence schematic diagram is quick, and availability is good, comprises face more extensive.Having made up to a certain extent existing candence software, to search single-terminal network incomplete, and the shortcoming that reading property is poor has facilitated schematic diagram slip-stick artist's use.The single-terminal network form of using the present invention to find out is as follows, i.e. network name, and the device name, pin name, the convenient use:

Embodiment

The lookup method of single-terminal network of the present invention, for three kinds of situations that single-terminal network occurs, they have common characteristics is exactly can't be included therein when deriving the schematic diagram network, so but can be present in pcb net table because of the existence that concrete pin is arranged in the network that corresponding pcb derives in.Just can find in-problem single-terminal network by contrasting these two kinds of net tables like this, what when specifically implementing, we adopted is that script perl realizes.

At first, process the net table that PCB derives.This net table comprises many contents, and network title wherein, device name, the device pin title is that we are needed, and exactly have this part to exist in this net table, and only form is not that we are needed, at first we will locate our needed part according to the special sign character, then according to our needed form, wherein content is arranged, obtain in our needed content and form and storage and a file A.

Then, handling principle figure derives next net table.When deriving the net table, five options are arranged, we select concise netlist(dialcnet.dat) because the net table that this option is derived is close with our needed form, just need to remove the rearmost description of each network.We realize this conversion with the perl language, and are stored in another file B.

At last, use the comparison program edit, relatively A file and B file, find out different networks, then outputs in file c, and add up the number of different network.This file is that finally we need to offer slip-stick artist's file.

The single-terminal network of searching in this way in the candence schematic diagram is quick, and availability is good, comprises face more extensive.Having made up to a certain extent existing candence software, to search single-terminal network incomplete, and the shortcoming that reading property is poor has facilitated schematic diagram slip-stick artist's use.

The single-terminal network form of using the present invention to find out is as follows, i.e. network name, and the device name, pin name, the convenient use:

Except the described technical characterictic of instructions, be the known technology of those skilled in the art.

Claims (1)

1. the lookup method of a single-terminal network, it is characterized in that adopting the form of software package that schematic diagram network and the PCB network that candence exports arranged and compare, find out wherein different parts, can find out the single-terminal network that exists in schematic diagram, this plug-in unit is to use third party's script perl language to realize, net table by principle of contrast figure network and PCB network just can find in-problem single-terminal network, and performing step is as follows:

At first, process the net table that PCB derives, this net table comprises many contents, and network title wherein, device name, the device pin title is that we are needed, and exactly have this part to exist in this net table, and only form is not that we are needed, at first we will locate our needed part according to the special sign character, then according to our needed form, wherein content is arranged, obtain in our needed content and form and storage and a file A;

Then, handling principle figure derives next net table, when deriving the net table, five options are arranged, we select concise netlist(dialcnet.dat), because the net table that this option is derived is close with our needed form, just need to remove the rearmost description of each network, we realize this conversion with the perl language, and are stored in another file B;

At last, use the comparison program edit, relatively A file and B file, find out different networks, then output in file c, and add up the number of different network, this file be final we need to offer schematic diagram slip-stick artist's file.